Improvement in hydraulic jacks



UNITE KSTATES ATENT OFFICE..

JOSEPH RYAN, OF ST. LOUIS, MISSOURI.

IMPROVEMENT IN HYDRAULIC JACKS.

Specilication fornn'ng part of Letters Patent No. 52,210, dated January23, 1866.

To all whom t may concern:

Beit known that I, JOSEPH RYAN, ot the city and county of St. Louis, andState of Missouri, have invented a new and useful Improvement in AngleHydraulic Jacks, and I hereby declare that the following is a full,clear, and exact description thereof, which will enable those skilled inthe art to make and use the same, reference being had to theaccompanying drawings, and to the letters of reference marked thereon,and forming part of this specification, in which- Figure l is aperspective View of one of the jacks and its transporting-carriage. Fig.2 is a perspective view of the transporting carriage. Fig. 3 is aperspective view of the jack separated from its transporting-carriage.Fig. 4 is an end elevation of the jack separated from its carriage. viewof the pipe connecting the reservoir for the uid used with the cylinderof the jack. Fig. 6 is a sectional view of the plunger of the jack.

The invention relates to so constructing a hydraulic jack that it can beso adjusted that the longitudinal axis of the plunger-will form anydesired angle of inclination with the horizon, which change of directionof the longitudinal axis of the plunger and cylinder can be accomplishedwithout injuring the joints of the pipe connecting the cylinder with thereservoir, and the jack can be subjected to the greatest pressure it ispossible to produce at any angle of inclination with the base or fulcrumupon which it rests without sliding back from the work it is intended toperform.

My improved jack consists of a metal cylinder, E, and piston-rod orplunger m, made of proper strength to resist and support heavy weights.This cylinder lrests upon and is secured rmly at its base to a stoutrocker-shaft, E', which turns freely in a semicircular bed or grooveembracing its entire len gth', and formed in a supporting-block upon aheavy bed plate or frame, D, constituting the base of the machine. Theshaft E is confined in its bed by collars at each end thereof.

The base D of the jack is prolonged forward, as illustrated in thedrawings, and is slotted or otherwise so constructed as to form y 'u imFig. 5 is a sectional horizontal ways for a sliding carriage, N. Thissliding carriage consists of a metallic plate resting upon the waysformed by the upper surface of the base D, and having a lug projectingfrom its under side, so as to fit in the slot between the ways. A secondplate, placed beneath the ways or in a recess cut on the under sidethereof, res ts against the lower face of the lug or projection from'theupper plate, and is held there by bolts e passing through apertures inthe carriage and fastened by wedgeshaped pins e passing through slots intheir upper ends. These bolts e thus tie and clamp the carriage upon theways, either locking it firmly down in place or leaving it free to slidethereon as the wedge-pins e are driven tight or left loose. Motion isimparted to this carriage N by means of a screw, L, passing centrallythrough'a threaded aperture in the forjoint to the front end of thecarriage N.

The cylinder E, inclined toward the front, is supported by a strongforked brace, M, whose upper arms form bearings to receive stout pivotsprojecting from opposite points in the cylinder, and which are securedin said bearings by suitable collars or clamps. The lower end of thebrace rests upon the carriage, and is pivoted thereto between two lugsprojecting "from its upper surface, as shown in the drawings. Thus, bysliding the carriage N backward or forward upon the ways through themedium of its operating-screw L, the brace M, pivoted both to thecarriage and the cylinder, will elevate or depress the upper end of thelatter, so as to vary its inclination to any desired angle, while, bylocking the carriage by means of the wedge-pins e', it maybe fullybraced at such desired angle and be at once ready for operation.

The base or bed-frame D of the machine is prevented from sliding orslipping back under the pressure which may be exerted thereon when atwork by means of corrugations cut over its entire lower face, the anglestherein being made quite acute and set back so as to point more or lesstoward the rear.

The cylinder E is connected with a suitable force-pump, B, placed uponthe rear end of the base D by means of a pipe, p, having a ward end ofthe base D, and secured by a loose series of socket-joints, p', whichrenders it so far eXible as that it will readily adjust itself to theVarying inclinations of the cylinder.

The pump is supplied from a reservoir, C, also placed upon the base D,by its side. This reservoir is connected directly with the cylinder E bymeans ot' a second jointed pipe, p, and closed bya suitable stop-cock,l. By opening this cock the tluid in the jack is allowed to escape intothe reservoir, and the plunger or piston m ot' the jack thus permittedto fall. This piston or plunger m of the cylinder E may be cheaply madeotl wood, its ends, however, being capped with metal, as shown in Fig.6. lts lower end is made to form a close joint with the interior ot' thecylinder by means ot' suitable packing held in place by a metal ring, m,whose edges are beveled, and which is secured by a set-screw, m", all asillustrated in Fig. 6 ot' the drawings.

My improved jack, with its pump and reservoir, may be readilytransported from place to place by means ot' a truck or carriage, A A,Fig. 2, consisting` of a stout frame, so constructed with its rear endopen so that it may run back and inclose the jack, and having a suitableupright structure, A Af, thereon, from which the machine may besuspended by means of chains n n n n, operated by a screw, O, in

the center ot' the structure, as illustrated in Fig. 1 of the drawings.

Having thus fully described my improved hydraulic jack, what I claimtherein as new, and desire to secure by Letters Patent, is-

1. The combination ot' a hydraulic cylinder, E, with a suitable base orbed plate, D, by means of a hinged support, E', substantially in themanner and for the purpose herein set forth.

2. The combination ot' an adjustable brace, M, with a hydrauliccylinder, E, and base or supporting-frame D, for the purpose of stayingthe cylinder at any desired angle of inclination, substantially in theina-nner herein described.

3. Thecombination ofa suitableforce-pump, B, reservoir C, and hydrauliccylinder E with each other and with a single supporting-frame or base,D, substantially in the manner and for the purpose herein set forth.

4. In combining and connecting a suitable force-pump, B, with anadjustable hydraulic cylinder, E, by means of a `jointed leXible pipe,p, substantially in the manner and for the purpose herein set forth.

JOSEPH RYAN.y

l/Vitnesses:

M RANDOLPH, WM. W. HALL.

